‘Neither does he use his right name, nor permit it to be spelt or spoken,’ said Aragorn.

OK, so how much time does Aragorn, or any of the Wise, spend in Mordor eavesdropping on every orc, troll, Variag of Khand, and Nazgul conversation, and reading through all the Mordor mail and literature to even make this statement with certainty? Hearsay, I say, hearsay.

Wait, balrogs have wings?! Can they fly, or are they more like penguin wings? (just kidding!)